Improvement in flux compositions for emery-tools



UNITED STATES PATENT OFFICE.

AUGUST CAESAR, OF NEW YORK, N. Y.

IMPROVEMENT IN FLUX COMPOSITIONS FOR EMERY-TOOLS.

Specification forming part of Letters Patent No. 201,910, dated April 2, 1878 application filed February 5, 1878.

To all whom it may concern:

. -Be it known that I, AUGUST CAESAR, of

the city, county, and State of New York, have invented a new and Improved Flux Composition for Emery-Tools, of which the following is a specification:

The invention will first be described in connection with all that is necessary to a full understanding thereof, and then pointed out in the claim.

The emery composition which I have found most advantageous consists of twelve ounces of emery, to which one and one-fourth ounce of flux, formed of six' parts of quartz, four parts of red lead, one part of borax glass, (melted borax,) and one part of saltpeter, is

-added, in connection with a binding material,

consisting ofthree-fourths of an ounce of puttypowder, one-half ounce of pipe-clay, and oneeighth ounce of magnesia. These parts are thoroughly mixed in a dry state, then moistened with water until a mass of such consistency is obtained that it may be readily pressed into molds of proper shape. The molded parts are then allowed to dry, and are placed in a muffle of fire'clay and heated to a red heat in an oven, commencing with a slow fire, and increasing the heat until a red heat is obtained. i

The tools are left exposed to a red heat for about three hours, until the mass is thoroughly burned and united, which is accomplished without a change in form. The fire is then extinguished and the articles allowed to cool gradually.

The emery composition is, by the exposure to the red heat, changed to a high degree of hardness, and melted into a homogeneous mass by the action of the fluxes and binding substances.

The fire-hardened tools made of this composition surpass in resistance to abrasion any composition hitherto employed for grinding tools.

Having thus. described myinvention, I claim as new and desire to secure by Letters Patent A flux compound for emery-tools, consisting 

